









Model 8691 – Control Head: controls and pilots the pneumatic actuator
| Parameter | Specification |
|---|---|
| Manufacturer | Bürkert |
| Model | 8691 |
| Device Type | Control Head for Pneumatic Actuators |
| Actuation | Single Acting |
| Pilot Valve | 3.0 mm |
| Operating Voltage | 24 V DC |
| Ambient Temperature Range | –10 … +55 °C |
| Supply Pressure (Pmax) | 7 bar |
| Control Medium | Filtered compressed air |
| Mounting | Direct mounting on actuator |
| Protection Class | IP65 / IP67 (depending on version) |
| Application | Valve position control and actuation |
Model 2101 – Angle Seat Valve: performs process flow shut-off/control
| Parameter | Specification |
|---|---|
| Manufacturer | Bürkert |
| Model | 2101 |
| Valve Type | Angle Seat Valve |
| Nominal Size | DN 15 (15M) |
| Seat Seal Material | PTFE |
| Actuation | Pneumatic |
| Pilot Pressure | 4.8 – 10 bar |
| Nominal Pressure | PN 25 |
| Maximum Pressure (Pmax) | 25 bar |
| Medium Temperature Range | –10 … +185 °C |
| Body Material | Stainless Steel |
| Flow Direction | Seat under flow (standard) |
| Application | Process, hygienic, and industrial fluids |